add split/bilinear_interp/flatten/op for support fssd #924

to be impl.  for fssd
add googlenetv1 and fssd unit test

add border check in gemm

add openmp support for ios

repair bugs in op kernels for FPGA track close #914

add nlp net supported &&add unittest &&add singlenet build #911

Update to format data for FPGA track close #908

fix #906 compile on ios

Add test code for FPGA track close #904

fix PRelu merge operation in Gemm

Format data for FPGA track. close #900

imp fusion_conv_bn_add_relu op in resnet

small clean

Need to format featuremap, filter & bias_scale for FPGA track, add files: close #884

fix bug in pool2d 2x2 math function